The purpose of the autopilot actuator is to change electrical commands from the FCC into a hydraulically controlled mechanical output.The outputs of the actuators become inputs to the aileron and the elevator power control units(PCU).

If the format parameter or rule is inappropriate to the type of airplane, equivalents likely to achieve the same objective may be used.

The priority computer compares the output parameters from the unit with its own available data by means of associated logic.

If the maintenance message does not show in CURRENT STATUS, then there was an intermittent fault.

Do a continuity check at the Alternate Exhaust Fan Receptacle.

The ozone converter prevents damage to the air separation module from oxidation of the membrane material by ozone.

The airplane fuel system supplies pressurized fuel from the center or main tank.

Before inspection, you should remove access doors and fairings.

The circulation of the air in the components is such that the temperature for specific component is not out of the limit.

Turbine blade tip clearances decrease when the turbine case is cooled.

This can cause a deterioration of the mechanical properties of the assembly.